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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2012.0214 Low: sudo security and bug fix update 22 February 2012 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: sudo Publisher: Red Hat Operating System: Red Hat Enterprise Linux Server 5 Red Hat Enterprise Linux WS/Desktop 5 Impact/Access: Increased Privileges -- Existing Account Resolution: Patch/Upgrade CVE Names: CVE-2011-0010 Reference: ASB-2011.0005 ESB-2012.0202 ESB-2011.0544 Original Bulletin: https://rhn.redhat.com/errata/RHSA-2012-0309.html - --------------------------BEGIN INCLUDED TEXT-------------------- - -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 ===================================================================== Red Hat Security Advisory Synopsis: Low: sudo security and bug fix update Advisory ID: RHSA-2012:0309-03 Product: Red Hat Enterprise Linux Advisory URL: https://rhn.redhat.com/errata/RHSA-2012-0309.html Issue date: 2012-02-21 CVE Names: CVE-2011-0010 ===================================================================== 1. Summary: An updated sudo package that fixes one security issue and various bugs is now available for Red Hat Enterprise Linux 5. The Red Hat Security Response Team has rated this update as having low security impact. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available from the CVE link in the References section. 2. Relevant releases/architectures: Red Hat Enterprise Linux (v. 5 server) - i386, ia64, ppc, s390x, x86_64 Red Hat Enterprise Linux Desktop (v. 5 client) - i386, x86_64 3. Description: The sudo (superuser do) utility allows system administrators to give certain users the ability to run commands as root. A flaw was found in the sudo password checking logic. In configurations where the sudoers settings allowed a user to run a command using sudo with only the group ID changed, sudo failed to prompt for the user's password before running the specified command with the elevated group privileges. (CVE-2011-0010) In addition, this update fixes the following bugs: * A NULL pointer dereference bug caused the sudo utility to terminate unexpectedly with a segmentation fault. This happened if the utility was run with the -g option and configured not to demand the password from the user who ran the sudo utility. With this update, the code has been modified and the problem no longer occurs. (BZ#673072) * The sudo utility failed to load sudoers from an LDAP (Lightweight Directory Access Protocol) server after the sudo tool was upgraded. This happened because the upgraded nsswitch.conf file did not contain the instruction to search for sudoers on the LDAP server. This update adds the lost instruction to /etc/nsswitch.conf and the system searches for sources of sudoers on the local file system and then on LDAP, if applicable. (BZ#617061) * The sudo tool interpreted a Runas alias specifying a group incorrectly as a user alias and the alias seemed to be ignored. With this update, the code for interpreting such aliases has been modified and the Runas group aliases are honored as expected. (BZ#627543) * Prior to this update, sudo did not parse comment characters (#) in the ldap.conf file correctly and could fail to work. With this update, parsing of the LDAP configuration file has been modified and the comment characters are parsed correctly. (BZ#750318) * The sudo utility formats its output to fit the width of the terminal window. However, this behavior is undesirable if the output is redirected through a pipeline. With this update, the output formatting is not applied in the scenario described. (BZ#697111) * Previously, the sudo utility performed Security-Enhanced Linux (SELinux) related initialization after switching to an unprivileged user. This prevented the correct setup of the SELinux environment before executing the specified command and could potentially cause an access denial. The bug has been fixed by backporting the SELinux related code and the execution model from a newer version of sudo. (BZ#477185) * On execv(3) function failure, the sudo tool executed an auditing call before reporting the failure. The call reset the error state and, consequently, the tool incorrectly reported that the command succeeded. With this update, the code has been modified and the problem no longer occurs. (BZ#673157) All users of sudo are advised to upgrade to this updated package, which resolves these issues. 4. Solution: Before applying this update, make sure all previously-released errata relevant to your system have been applied. This update is available via the Red Hat Network. Details on how to use the Red Hat Network to apply this update are available at https://access.redhat.com/kb/docs/DOC-11259 5. Bugs fixed (http://bugzilla.redhat.com/): 477185 - sudo changes uid before calling SELInux calls, preventing it from setting terminal context when using non priv account 627543 - The Runas_Spec are ignored in sudoers file 668879 - CVE-2011-0010 sudo: does not ask for password on GID changes 673072 - sudo segfault 673157 - sudo fails to report error correctly when execv(3) fails 697111 - sudo -l inserts new lines based on terminal width, causing errors when output is piped. 6. Package List: Red Hat Enterprise Linux Desktop (v. 5 client): Source: ftp://ftp.redhat.com/pub/redhat/linux/enterprise/5Client/en/os/SRPMS/sudo-1.7.2p1-13.el5.src.rpm i386: sudo-1.7.2p1-13.el5.i386.rpm sudo-debuginfo-1.7.2p1-13.el5.i386.rpm x86_64: sudo-1.7.2p1-13.el5.x86_64.rpm sudo-debuginfo-1.7.2p1-13.el5.x86_64.rpm Red Hat Enterprise Linux (v. 5 server): Source: ftp://ftp.redhat.com/pub/redhat/linux/enterprise/5Server/en/os/SRPMS/sudo-1.7.2p1-13.el5.src.rpm i386: sudo-1.7.2p1-13.el5.i386.rpm sudo-debuginfo-1.7.2p1-13.el5.i386.rpm ia64: sudo-1.7.2p1-13.el5.ia64.rpm sudo-debuginfo-1.7.2p1-13.el5.ia64.rpm ppc: sudo-1.7.2p1-13.el5.ppc.rpm sudo-debuginfo-1.7.2p1-13.el5.ppc.rpm s390x: sudo-1.7.2p1-13.el5.s390x.rpm sudo-debuginfo-1.7.2p1-13.el5.s390x.rpm x86_64: sudo-1.7.2p1-13.el5.x86_64.rpm sudo-debuginfo-1.7.2p1-13.el5.x86_64.rpm These packages are GPG signed by Red Hat for security. Our key and details on how to verify the signature are available from https://access.redhat.com/security/team/key/#package 7. References: https://www.redhat.com/security/data/cve/CVE-2011-0010.html https://access.redhat.com/security/updates/classification/#low 8. Contact: The Red Hat security contact is <secalert@redhat.com>. More contact details at https://access.redhat.com/security/team/contact/ Copyright 2012 Red Hat, Inc. - -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.4 (GNU/Linux) iD8DBQFPQyMDXlSAg2UNWIIRAn42AKCtVY7KQJSk2HpwSOuZfu9PjSRqvACgt3n2 HmtBMRhdgnVA/HlM2stOxd8= =AyyQ - -----END PGP SIGNATURE----- - --------------------------END INCLUDED TEXT-------------------- You have received this e-mail bulletin as a result of your organisation's registration with AusCERT. The mailing list you are subscribed to is maintained within your organisation, so if you do not wish to continue receiving these bulletins you should contact your local IT manager. 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On call after hours for member emergencies only. =========================================================================== -----BEGIN PGP SIGNATURE----- Comment: http://www.auscert.org.au/render.html?it=1967 iQIVAwUBT0R86u4yVqjM2NGpAQKKNg//a2xj0zyuytM9ZwOIyJjw3gImttTzQwaf O9qg7ebPt9bb3ChZiLUY+d6aewgr/On/0alT5YV1VTsjwtLoy5u5ddK9LXeeJ1PP 01kSRlCQeJ86anOYOMm0y8Ez6V/0AW3pDcyRvSJRbahFFB1LLsjXn65jSPhoM+HE 0Uw6FxfuR+X7abgaY8Qo64meoLstSKcuuzGewVKXVi8NyzipYqKCyEbgyoK518XG GtTAIgvB7HL8V+FFcjMkvOduF1PvUY/d/rnB4iW4nZvneYtd5LOPm3iAulFwsldR 6wMbIGK2+SJabqdDYdQLbjKF+lgy/xGi7RnMCGHdaA9I5xXbkjXg6+iYZgzaymMI xahlVPIKE9NVRgvazyB7ke/wEF0XRowV5GBheluRAe889wX0rcKmHhkUMqa/cs/I sSgAwhcYzfdc1GRyAYDY01XRBGDxz2iXzDu+DQ60eDTVtviYQlN9zjxKwY4snP8y XANH3NH5n3TSStIvflDsi+LLmIavdM3APcWmGsPfAum6F51B5kJ3jm4pb13IeQVQ aQbt/qUqbVdCrDO72DbZka2nyCNj1WNe9PvewBYjXaevZLIFLROfQ/oXWyMn/5hb ahAC9yWom6R20ZErA7YDf+qGR4QsUqHxnEbxvTSfPdRcypGwSvcTw0waMxvx0Wh8 6Ffykoj6dGI= =BUHK -----END PGP SIGNATURE-----